Automatic pressure operated lathe



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AUTOMATIC PRESSURE OPERATED LATHE Filed Aug. 27, 1940 6 Sheets-Sheet 2 ATTORNEYS T. L. MAY

AUTOMATIC PRESSURE OPERATED LATHE sha etsish 3 Filed Aug.. 27' 940 N QR ATTORNEYS Jan.'4, 1944. MAY

AUTO ATIC PRESSURE OPERATED LATHE I I Filed Aug. 7 27, 1940 6 sheets sneet 4 III"! E v 3 N ATTORNEYsh 11 I Msw & W- 5 Q i Q Jan. 4, 1944. MAY 2,338,125

v AUTOMATIC PRESSURE OPERATED LATHE Filed Aug.. 27, 1940 I 6 Sheets-Sheet s a INVENTOR BY! a: Z z

ATTORN EYS Jan. 4, T. L. MAY I AUTOMATIC PRESSURE OPERATED LATHE Fil' edAug. 27, 1940 e Sheets-Sheet 6 INVENTIOR iz fi d 2' ATTORNEYS a... productionyotsshells I pt d p i arily to operate on shell-blanksiii-e7 1 sequentlythe necessary size I I increases speed .ot production by sinn:ili aneously -cutt n8--.over a plurality oi zones ot-ithe worir j asystem various I Thomas May,

assignor to lathesioryuseinthe"manufacture of shells, for

munitionspurposesyand the like.

It'is ankobjectot the, present invention to pro- Reliance r t tario, Canada,

. -Machine and. Tool Com- Army. New-Xork, N. Y-, a rim composed of the vide a lathe suitableior use in the. quantitative rapid-productionjoishells tor munitionsgpu'r-j poses] Q 1 nature that controlied ieed-and rapi I Another obiectof the present-invention is'the the cuttingtools to their starting. positions 'is provision of Iaiathe having'high power, accurate' cutting qualities and high speed operation. 1

The lathe oi this invention iscapahieor use, andiwhiiei iiminary'tothe nosingoperationais also adaptable for use in sheil flnishing operationsand to: I aeronautical tooling operations anjdothermet'al turning, {cutting operations requiring high a Dwer,[accuracyot1cutting control and speed of operat1on w-y r '11-. -is"another-ohiect or -.t his=invention to at vide alatheprovidedwitha plurality of cutting tools; operative both longitudinally :andtrans'--' verselyloi the turning-axisoi the lathe, whereby each cutting tool I will operate only over "a corn-4 'parat vely. small oitoolsareduces-the;tool carriage travel and conscopeoi the claims the. workbl'ank. The provision oisuch plurality;

oithe lathe. vIt

ing about from pointto 'reach them. Y I q t Another object. or invention is I t provide then sought to reference being forming a part hereof and which, show, merely torthe purposes of illustrative disclosure,

a preferred I expressly understood, however, that various changes may be made in practice withinthe without digressing from the J ings I. i'o'llmyfzing"line bers, EstherProtesThomas W9 3 I I I Application au ust 21, 1940, Serial a... 354,369' I I v s. (cue-14)- I I lhelpresent' inventiori relates "to-lathesand conveniently and quickly regulate the tool move v more; I cularlyto fluid pressure-controlled mentsand other machine operations without detailed attention to searching for controlsor mov-' point ofthe machineio pressure reeds for the cutting toolvot such a turn of eiiected.

To the accomplishment ot-the foregoing and such other objects as may hereinaiterappear; thisiinvention consists in the construction arrangement 0! parts hereinafterv described and be defined in the appended claims,

had to the accompanying drawembodiment of the invention, it bein inventive idea.

Inthe accompanying drawings in'which simi-i I lariyreierence characters denote corresponding I I tone. of the work surface and whereby a multiplicity of; turning and cutting f 3 mg. 1 is a front elevation of a lathe p I opcrationspmaybeperiormed simultaneously on,

my invention;

2'is a top plan view of the lathe of Fig. 1; i Fig. 3 is a vertical: section on an enlarged scale taken along line 3- 4 of Fig. 2 viewed in the direction of the arrows and illustrating the struc- 1 ture' of the lathe head;

blank. As. a result, the Arianhmay be .-quickly*f latheoperations Aiurther'obiect. oiithe inventionlis to'provide 5 tluid (gaso'rliquid) means bressureieed o2 e-p t n wc fsb th-t sn v el n 10mm:- dinally-oi"the' turningaxiaoi the lathe. i

v stiil' anothergobiect 'isfto ,praviaen m' (Eas er liquid) .pressurefcontrolled-zmeans IOI'POPOI'GtiOII both ortn headand thei tailstockoi the lathe,

such means se'rving to. properly position and positively clamp a work" blank between the two during utjting operationathereon and permitting quick-releasc and removal of a flnlshedyblank;

Fig.4 is a vertical section onan enlarged scale taken along line J direction or thearrows and iiiustratingthe strucoi Fig. 2 viewed in the ture of the tail stock ot-the lather I Fig. 5 is apartial end elevation-of the lathe viewedtr'om the right of Fig. 1;. 1 V

Fig. 6 is a partial sectional viewillustrating the position of a shell blank in the lathe during A- Iui-ther obiecto! invention is to provide I or controljicrjthe. pressurcsuppiy-tothe pressure at a central control point-in such manner that I actuated having'aminimum'numberot controis-,.ali conveniently located the cutting operations thereon;

Fig. 6ais a longitudinal section type oiflnished work machine of this invention; 1

Fig. '7 is an enlarged partial vertical section taken along 1ine"I-'I of Fig. l and illustrating. :in detail the tool carriage-carrier assembly; I

Fig. 8 is a view'similarto that of Fig. 'l-illustrating "further details including the pressure cylinder for tool cross-feeding in the tool carrier assembly; I

Fig. 9 is a transverse vertical section taken "along line 9-9 of Fig. 8;

Fig. 10 is a top pian'view on areduced scale of a particular 1 blank cut to shape in thei h of the device shown in Fig. '1 with the tool clamp removed; V ".Fig. 11 is a diagrammatic view of the valving the frame bed are provided both at the front and rear of the machine bed. Each tool ca'rriage is provided with a plurality of tool carwork/blank carried between the chuck and tall I riers adapted for cross-feed, e. g., to move transversely of the frame bed and into and out of the stock spindle. The chuck preferably is a fluid pressure actuated one. The tail center piece or spindle is adapted to be reciprocally moved toward and away from the work blank by fluid pressure controlled means. The tool carriers likewise are movable toward and away from this work blank by fluid pressure controlled means, and suitably coordinated fluid pressure systems of control are provided for imparting desired and required fluid pressure for operating the chuck, the movement of the tail center piece or spindle, the movement of the tool carriages, and the tool feeding movement of the tool carriers. Likewise means are provided in the pressure systems of the tool feeds to provide controlled cutting feeds and quick return of the fools after completion of the cutting operations on the lathe. I

Referring more in detail to the drawings and ceive a rotating double acting fluid pressure cyl inder to be presently-described.-

Driving gears 60 and 6| ofsuitable type an supported and keyed or otherwise fixed at I and 63 to the mandrel 55 in spaced relationshii inside of the casing 50.

.A drive shaft 85 is rotatably supported be tween the roller bearings 66,81 in the casing 50 and by the roller bearing 68 in the tubula: or sleeve bracket I 0'. This drive shaft carrie: two spaced freely rotatable gears 89 and Il meshing respectively with the mandrel drivini gears 60 and ii. Either of the gears 8 or II may be coupled to the drive shaft 65 by a suitable instrumentality such as the dog clutch-II The latter, in the embodiment shown, comprise: a ring member I2 slidably keyed to or otherwisi suitably attached on the shaft '65 in the space between the gears 69 and III. This ring membel is provided with oppositely extending engaging flanges or pins I5 and IS on its lateralfaces and with an annular groove or recess I4 on its peripheral face. The gears 69 and I0 have oppositely extending engaging pins or flanges I1 and I! which may engage respectively with the pin: or flanges I5 and I6 when the ring member I! is moved in the axial direction of the shaft 5.

The flanges or pins IS, I6, 11 and "II are so admeasured that in the neutral or uncoupled position of the ring member I2 shown in Fig. 3. there is no inter-engagement between flanges on the gears and flanges on the ring. Movement particularly to Figs. 1 and 5, I0 denotes generally 1 a lathe framehaving a horizontal bed II. A

lathe head denoted generally at I3 is, carried on the frame at one end of the bed and a tall stock II is carried on the bed at its opposite end. The

front and rear sides of the frame adjacent the bed are provided with horizontal tool carriage rails on which are slidably mounted the respective tool carriages II and I8, each of which car-' ries respectively a plurality of toolcarriers I9 and I II to be described more in detail hereinafter.

The work blank W (Fig. 6) is adapted to be supported between the head and tail stock and rotated in a manner to be presently described. Tools carried by the carriers I 9 and I 9' are adapted to be cross fed toward and away from the work blank and the carriers I9 on the forward carriage II are movable as a'unit with the latter along the bed and in such movement are uided so as to cut the surface of the blank II to desired profile. Since the various operating,

parts of the lathe can best be described separately, each will now be so described and later coordinated in a general description of operation of the machine.

The lathe head (Figs. 1, 2 and 3) r The lathe head I3 comprises a casing 50 which is suitably supported from the frame I0 as by bolting at SI and 52 or the like. This casing of the ring member I2 toward the gear IQ will cause the flanges I! to engage flanges II and .to impart driving motion to the gears 68 and 60 and'consequently to the mandrel 55 at a speed dependent upon the gear ratio of gears 89 and 60. Movement of the ring member I2 oppositely toward the gear III will cause the flanges 18- to engage flanges I8 and to impart driving motion from the shaft 65 to the gears I0 and 6 I and consequently to the mandrel 55 at a speed dependent upon thegear ratio of the gears 10 and 6| which diflers from thatof the ratio of the gears 69 and 60. The required shifting of the ring member I2 may be effected in any suitable way. For example, a'lever suitably pivoted at 8i to the casing 50 is provided. Thlslever has an engaging pin or follower 82 at one arm end which extends into the annular groove I4 of the clutch ring I2 but permits free rotation of the latter. The opposite arm 83 of the'lever extends outwardly from the casing 50 (Fig. l) and has a manipulating knob 84 at its end. Rotation of the lever arm 83 clockwise'or counterclockwise causes a relative shift of the ring member toward one of the gears 69 or I0 to effect coupling of the desired one of these gears to the drive shaft 6!.

Suitable means for driving the shaft 68 are provided. To this end, in the embodiment shown. a mum-band pulley wheel 90. (Fig. l) is carried on one end of the shaft 65. Multi-band belting. 9| couples pulley wheel 80 with a corresponding pulley wheel 92 on the drive shaft 93 of a driving motor 94 (Fig.2). The motor is suitabl supported on a pedestal extension III of the frame l0 as by bolting at 95. Electric power is supplied to the motor in any convenient man-. A control switch 98. suitably. carried on a control panel 91 (Fig. 1). located ner (not shown).

on the front of the frame In near the head serves for switching on and off of the power supply to the motor. The electrical connections between switch and motor being'conventional are not shown. Other convenient means ior driving moved transversely of the lathe bed. An upthe shaft 86 may be employed. o

The :driven mandrel 55 (Fig. 3) is provided with any standard form of chuck. In the embodiment shown this comprises an expa'ndible chuck I of anystandard type (Figs. 3 and 6) suitably carried in the mandrel and extending forwardly from the latter toward the tail stock of the machine. This chuck is adapted to be operated by gas or liquid pressure controlled means.- To this end, a double acting rotating gas or liquid pressure cylinder IOI of a standard well-known type" is carried on'the threaded end 5801' the mandrel. This cylinder generally comprises a piston I III rotatably borne in a sealed chamber and reciprocablymovable longitudinally. of, the cylinder under gasor liquid pressure supplied to opposite sides or the piston from a suitrod I04 as shown extends from the chuck I0I through the hollow mandrel 55.. In operation,

'; introduction of gas or liquid into the. cylinder through one or the other of the pipes I02,I03

" I04 and consequent expansion or contraction of the chuck I00. The control system for supplying. fluid (gas or liquid) to operate -thetcylinder will be hereinafter described.

' The taizetoelt (Figs. 1, 2 and 4) It is desirable witha machine of the character described to provide'atailstock having a rotatable tail center piece or spindle capable of rapid standing flange I80 extends from thebase member I56 through an opening I8I in the base plate into a cut-away portion I50 .in the; supporting portion I62 or the casing I50. and between two oppositely arranged transversely extending threaded Journals I63 each bearing an adjustment screw or bolt I64. The latter engage the flange on opposite faces thereof and serve for lateral or transverse adjustment of the casing I50 relative to the base member I56 for the purv pose of effecting transverse adjustment or the 'will cause longitudinal movement of the draw rod tall stock center piece orspindle relative to the lathe bed. Other suitable transvers adjustment means may be used.

The base member I58 is slidably carried on a pair of horizontal guide rails I65 (Fig. )'ex-;

tending longitudinally of the lathe bed. I A clampv ing plate I66 engagingbelow thegulde rails I85 and secured to-the base plate I52 and base member I58 by the locking bolts I81 serve to ex the bore 'I5I or the casing. This quill has a longitudinal bore I" provided adjacent opposite ends with larger diametered bearing receiving portions I12 and I13. A'yoke member I14 is suitably; attached to theend face IQot the-quill by bolts I15 or .-;the like. At the other, and oi. the V 1quill, the 'boi eisfurther'enlarged to define a shoulder I16 and internally threadedat I" to receive a locking nut I18 whichservesito retain movement toward the chuck to position and clamp a a. work blank W between them in such"manner I19 is rotatably supported in the quill I10 by the as to eliminate substantially all'danger of off.-

. centering. of the work duringthe tooling operations. Since the tail stock is located at a point the tail stock rotatable center piece or spindle I19 in the quilljin'a-manner to be 'presently-described. a The tail stock rotatable centerpiece or spindle roller bearings I80 and I8I.:located in there I spective enlarged portions I12 and I13 of the relatively remote from the operato'rsposition, the

. necessary with suchstocks' requires the operator T r to leave his control position. It is also desirable I to provide a tail stock spindle which is conven-q iently movable to facilitate, positioning of a work.

blank in the machine. In: the tailstock of the present invention, therefore, I substitute a novel fluid pressureactuated tail stock center piece or spindle which may be conveniently foot-operated from -a position of. the operator at thefront or the lathe.

In general, the tail stock of this invention comprises a center piece or spindle rotatably sup the quill.

ported in the tail stock casing and reciprocably f In the embodiment shown, the tail stock I4 comprises a casing I (Fig. 4)'having a horizontal bore I5I. The casing has a horizontal base plate I52 supported in spaced relationship from the casing I50 and provided with a flat versely of the lathe bed and rests upon a base member I 56 having a correspondingly shaped top surface I51. This base member is also provided with transverse grooves I58 carrying guide rails I50 which extend into the guide grooves I oi. the base plate so that the casing may be guldedly bore and is fixed against longitudinal movement withrespect' to the quill by'the'ilocking nut I18 and abutment I14 on the yoke I14 which engage the side faces'resp'ectively. of the roller bearing assemblies and prevent longitudinal displacement of the tail centerpiece or spindle relative to An end plate I82 is suitably attached to the casing. I50 at I83. This plate has a central bore 1 I84 and an annular flange I85 at the inner end -of said'bore extending into the bore I5I or. the

casing. This flange'serves as, an abutment to limit rearward travel 01' the quill by engagement v with the yoke I14.

The quill is reciprocably movable in the bore I5I by fluid (gas or liquid) pressure controlled; means. To this end, a double acting fluid pres-{'1 sure cylinder I80 of a standard well-known type is attached to'the end plate I82 as at -I80' with its connecting rod I8I attached to the yoke member I14. This cylinder generally comprises a piston I90a reciprocably movable in a sealed cylin- -der chamber under fluid (gas or liquid) pressure supplied to opposite sides of the piston from a suitable source through pipes I92 and I 83. The

= bottom surface I54. This surface is provided .with two guide grooves I55 which extend transpiston has the coupling or connecting rod 'I9I extending therefrom which is attached to the yoke member I14 at I9I so that the pressurecontrolled movement of the piston is transmitted through'this rod to said yoke member and consequently to the quill which is thus movable longitudinally in the bore I5I under-action of the cylinder I60.

head I19 oi the live center piece or spindle I19 toward and away from the head and into and out of engagement with the work blank W in a manner to be presently described. The control system for supplying fluid pressure to operate the cylinder I90 will be hereinafter described.-

Tool carriages (Figs 1, 5 and 7-9) The lathe has the tool carriages n .n'd l8 operating at the front and rear of the lathe bed respectively, each of which is adapted to move along the said bed between the head and tail stock of the machine.

To this end, the carriage rails 200, 2!, each having dovetailed section (Fig. 5) or other suit-v able section, are suitably supported horizontally from the front and rear of the frame. adjacent to the lathe bed. On the forward rail 200, the tool carriage "having a dove-tailed or other suitably shaped groove 203 to receive the rail 200, is slidably mounted. This carriage has an inclined upper table. surface 205 on which front tool carriers is to be presently described are mounted. A similar tool carriage it having a dovetailed or other suitably shaped groove 206 to receive the rail.20| is slidably mounted on the said rail 20]. This carriage l8 likewise has an upper table surface 201 inclined in opposite direction to that of surface 205 and the two surfacesslant inwardly and downwardly toward the lathe bed. Each surface (205, 201) has a pair of spaced parallel locking grooves 208 having T-section or means such as set screws or bolts 225 (Fig. serving to fix it in an adjusted position on the carriage rail 20i. The forward carriage |1 may be similarly equipped, if desired.

Tool carriers (Figs. 7-10, inclusive) The front and rear tool carriages i1 and I8 are each adapted to support a plurality of tool carriers l9 and I 5', respectively, each of which moving transversely of the carriage travel path I must be capable of cross feed, 1. e., capable of and into the work blank W. In the embodiment shown, four tool carriers it are supportedon the v front tool carriage and two tool, carriers it are supported on the rear carriage. The number of such carriers on each carriage is optional and fewer or more tool carriers may be supportedon other suitable section for a purpose to be preso ently described. These grooves 200 extend in a direction parallel to the lathe bed.

Means are providedfor imparting reciprocal motion to the front tool carriage 11 by the use of fluid (liquid or gas) pressure. In the em#,

bodiment shown, the means comprises a double acting pressure cylinder 2|0 (Figs. 1 and 5), suitably attached as by bolting at 2| l to-the carriage rail 200. This cylinderhas a horizontally extending pressure chamber 2|0 having inlet conduits or pipes 2|2 and 2|! (Fig. 11) at opposite ends. A suitable piston 2 is slidably movable in the pressure chamber 2H! and reciprocated longitudinally thereof under fluid pressure supplied to the chamber through the ports 2 |2 or 2|3 from the pipes 2|5 and 2" respectively in a manner to be presently described. A piston rod H8 (Fig. 1) is attached to the piston 2H and extends outwardly from the chamber at 2|9, a suitable packing gland arrangement 220 being provided to prevent escape of pressure fluid (gas or liquid) from the chamber 210 during operation. The piston rod is suitably coupled to the tool carriageat 22-| so that reciprocal motion imparted to the piston 2M and piston rod 2! by pressure actuation of the piston is correspond ingly imparted to the carriage causing it to travel on the rail 200 along the carriage bed. Cylinder chamber 2| 0' has suilicient length to providev the necessary stroke or extent. of tool carriage travel over the rail 200 to carry out the front tool-cut- .j' ting operations to be presently described.

. The rear carriage i8 may be similarly reciprocated along the rail 20|, by the use of a similar pressure cylinder 2|0 (Fig. 2) but in the embodiment shown this carriage is adapted. to remain in a predetermined fixed position on the carriage bed inasmuch as' the tool carriers i9 thereon are not required to be moved in the longitudinal direction of the work blank.. This rear carriage, therefore, while also capable of adjustment along the rail 20 I, is provided with suitable positioning each carriage. Each tool carrier has identical construction and one only will be described.

Each tool carrier includes a profile slide or base block 250. This block has a pair of parallelly extending rails 250' adapted to slidably engage in the portions 208' or the locking grooves 202 as shown in Figs. '1 and 8. Locking bolts 25| 4 (Fig. 9) having heads engageable in the trans-. verse portions 208 of the grooves 200 extend upwardly through suitable bores 25l'in the base block and are equipped with clamping nuts 252 serving to clamp the base blocks to the carriage surfaces (205 or 201) in any adjusted position.

The block 250 is provided adjacent its upper surface with a cam or profile bar groove 252 shaped substantially as shown inrFigs. -'l and .8. This groove slidably receives a cam or profile bar 254 having a transverse section complemental to the transverse section of the groove. The block is freely,slidable in'the longitudinal direction of the can! or profile bar during carriage travel.

The cam or profile bar'itselt is suitably fixed against longitudinal movement by attachment at I 254' through suitable linkage (Fig. 2) to the lathe bed l2 and may be replaced. as desired. The upper surface of the block 250 also is provided with a rail"! having the dovetail section shown in Fig. 9 or other suitable section. This. rail extends across the width' of the block 250 perpendicularly to the cam or profile bar groove 252 and to the longitudinally extending lathe bed. I The rail has arcutout portions or recess 255' in] 252 for a pur-f' I the region of the cam bar groove pose to be presently described.

A tool adjustment slide block in provided with a groove 258 having a cross-section shapedto slidably receive the rail 255 is provided. This slide block has a transverse bore' 255 open at its end 259' and having a reduced opening 250 atits other end. A tubular bracket arm or sleeve 20| is integrally formed with or attached to the slide block 251 with its bored-out portion 252 in axial alignment with the'bore 259. The bored-out portion- 252 is reduced in section at 252' in the'end wall 25l'. An upwardly extending flange 253 is. provided on the arm 25L This flange has a hori-' j zontal bore 254 fora purpose to be presently described. I of the bore 250 is closed by on f end plate 255 suitably attached to the slide block I 251 and having a bore 255' in axial alignment with bores 25!), 252 and 252'.

The end 259' A tool adjustment bolt :10 extending through the said bores is rotatably borne in the-bores 252' and 255', and held against longitudinal movement by the nuts 2". The bolt has the threaded por-' tion 210' located in the bore 259. An adjustment nut 212 in the bore 259 engages this threaded portion. This nut has flanges 213 slidably en- Clamping nuts 30! serve to press the flange 3.3

Basins in longitudinal grooves 214 located in the of the member 302 tightly against the cutting wall of the bore 258 to prevent rotation of the tool 288 and lock it to the tool block 280 in the saidnut 2'l2. A suitable manipulating knob 21! groove 288. A A is carried on the bolt 210 for rotating the'latter. 5 In the embodiment shown, iou'r tool carriers The nut 212 has a. lateral flange 216' adapted having the structure just described are mounted to extend into the cutout portion 255' in the on the front tool carriage and two tool carriers transverse rail 255. A cam follower 211 is rotatof like construction are mounted on the rear tool ably borne upon a pin member 218 which is carriage. a threaded into a bore 216'in the flange 216. This The tool carriers just described operate as folcam follower extends into the cam or profile lows: v

v groove 2" in the-cam or profile bar 254. Thus After each Profile Slide Orbase block 250 has movement of the profile slide block 250 with the been l mped to the tool carriage suriace 1nthe carriage I! along the lathe bed. will cause the desired adjusted position by means of the clamptool adjustment slide block 251 throughthe cam 1 lug nuts 252. and a desired cuttink 00 2" follower 2l1'operating in the cam groove 254' to clamped O e tool block "I, the tool adj tiollow the pattern set by the cam or profile groove ment Slide block 251 is adjusted or depth 0 o for cutting of the work blank in a manner to be cu This adjustment is e e ted by rotation of.

described more in detail hereinafter. Also as a I t ma pul ing knob '21! of the bolt 2". Such result of engagement of th follower in th rotation causes the said bolt'to rotate in the nut cam groove 254, rotation of the manipulating which latter is fixed ag inst r ta o h ou knob 216 will cause relative cross-feed movement engagement oi its flanges Z'iI'lnthe ves 214 of the slide block 251 with respect toithe nut 212." and through engagement of the cam iollower l'l'l A rail 2" having dovetailed or other suitablethe Profile cam {move As result of the Y section is provided onthepupp rurf if t rotation of the said bolt therefore, the latter I p s ewayill-mime"M a- 7 d l d is on 288 and passageway 29! in the --bloekj2fllf'leadi ng 'Ifheuppersurfa'cebfthe slide block z't'l has a g tool-supporting'groove' 2 98 to receive a cuttingtool 293. The blockisal'so provided with aplurality oi threaded bores lfl li'car'rying the vertically ex tending clamping boltslll. 'A'. tool clamp nemher 302 having a downwardly extending flange "I slide block 251 and it extendsinjthesanledirec 1 I screws through t e t 11! causing relative cross mm s th fan :55, A r s i d pressure. mfeed motion of the slide block 251 with respect to ated slide block 2a: is slidablyiborneon the rail the block, 9 in direcfim W ev being provided. having the turning axis of the lathfli. 8-, t0 dovetailed or other suitable section to 'slidably "30 the ep receive the rail 280.

Introduction now of fluid under pressur to the The slide block zumstsr's-su'rs :cylinder bressurecylinderllll through th p sa way 28! h b 23: t gg 'p r nerteth b e will cause the toolblock 251 to cross feed forin the slide block and to the rail 280; This cham-v r yt wa-rd the work blank. for cuttingp raberextends entirely'through theblock and is-pr'o- 33 m forward stroke 0 the slide llllock vided at'its opposite-ends with the threaded-pork. ne' limited by amazement of the end 1" of tions m and m. A removable threaded plug the-Piston land the s m 0 long as fluidm is threaded into the threaded portion 28: and .spressure 1s tamed w the passageway serves to effectively seal this end of the chamber.- 29km? will be maintained in this A removable plug nut m is threaded into the -40 b d cutting Positionthreaded portion 284 and serves to seal theother'. Feed movement now)! the carriage end of the chamber. This plug-nut has an axially r 1 81 81128 guide rail 200 will cause the profile slid extending g t r bore 5 block 250 to move with it and slide over the proiile A piston m Operates in the chamber m. a cam be? "4111 whose ofi cam groove the piston has a piston rod 289 whichextendsiout cam 101mm?! now 8" k wardly from t piston andthrough the e r the cam groove will give cross reed movement in t nut a a smtable packing .k a m- Q to the slide-block 251 and slide block 28! as a unit ment being provided at 280 to seal the chamber m the suppm'teiizon the tool buck. during relative mov'emento! the tool blockand; ndbeumlunderpmssure Omaha Plum" p s on rod. The piston rod at its outer end ha 'inder 282 against the work blank W, will cut and a portion 289 oi-reduced diamete'rjdeflning a 'P m Q 'Y blank corn-Fwd the shoulder 91 ms portion extends-11.911811 proflleoi the cam groovelfl' over the Path 0 bore, 284in-the flange m and unneeded-arm? 1 h Particular-Wm mower I a toyrqpeweithe attapmng and clamping Mtge"; 5 When the tooicarriage "has reached the limit 202. 'Thesenutsserve.to'fixedlyattachthepiston h Btmke' 111114 N thmllih the rod to ihe flangeffl l'jso tliatfflllid pressureinjthe. ."P ssageway 294- is removed and introduced chamber'282at' one" end or theother-orJ-the piston 288 serves to give croisyieed movementito the slide-blocklti' on the guide rail 2 'relativefto the fixedly-supportedpiston-rod? A'ifluid' inlet t i m9 k mars -n; the tool j mm; h

to the opposite-ende the'cylinder chamber on pfl i f' l m ere-Pro d he e @hWW ,..)?'P lied pressure source'in" manner described.=.' I

ection.--' qnce knob is adjusted for agiven epthof cut 'I'he" travel-st ire of the iorwardcarriage ll is olarrangedthat with the plurality of tool carriers, znounted--ithereon,' each: 'carrier";wi1l. over-travel ,somewhat "the'c'utting zone or the carrier directly to pressxthe tOOT'iIltO the groove m :and holes ls. he ed cutsurfece o'f he k'wlll be rosy r ceive theolainping'bolts 30.! is provided; entirely rreeoi ridges or blemishes oi other kinds through-the passageway-285 ,to the opposite side ;oi the piston. "This causes a'reverse motion of t'l is immaterial'asto whether manipulating I I knobpfli is-adiu'sted beiore or after pressure 'is intlfqduc'ed into cyli der "2- in the i'eeding diit need not be ad-Justedagainuniess thoi cut is'desired ora'newcutter I fidiaceniii; Asa resultoiithis over-traveland consequent overlapp nloi cutting zones or adjacent a short distance before full tool cutting depth is achieved.

The tool carriers I9 on the rearward tool carriage I8, which is held stationary in the embodiment shown during cutting of a shell blank are supported in a fixed spaced relationship relative to each other so that the cutting tools 299' thereof which are cross fed into the work blank in the same pressure-actuated manner as those on the front tool carriers will serve as the work blank is rotated simply to trim the blank to desired length between its ends. The pressure cross feed of these rearward tools 299 being toward the work blank in the opposite direction to the pressure cross feed of the forward cutting tools 299 has a counterbalancing effect which eliminates substantially all tendencies toward off-centerin of the work blank W supported in the lathe.

It is to be noted, too, that the angular arrangement of the tool carriage surfaces 204 and 201 and resultant angular arrangement of the tools 299, 299 relative to the horizontal plane of the lathe bed I2 results in cross feeding of the tools inwardly and downwardly toward the work blank with the tool cutting edges engaging the surface of the blank above the horizontal central plane. This arrangement provides better chip clearance. Also this angular arrangement provides a vertical down thrust component which-presses the tool carriages I1 and I8 on to their rails 200 or 20I and thus increases accuracy of the tool cutting operations.

The control system The control system for supplying fluid (gas or liquid) pressure to the pressure cylinders hereinbefore described is illustrated diagrammatically in Fig. 11.

In the embodiment shown, the pressure cylinders IN and I90 which serve respectively to operate the chuck I and reciprocate the tail stock spindle I19 operate under air pressure supplied from a common pressure tank 3").

Air from this tank is led by pipe'or conduit 3I I to a suitable pressure adjustment valve 3I2 and from there to a distributing conduit or pipe 3I3. A branch conductor pipe 3 connects this distributing pipe 3I3 to the inlet of a foot-operated air control valve 3I5 of standard type which is connected at its pressure outlets A and B to pipes I92 and I93 leading respectively to the cylinder I90 on opposite sides of the piston I90 (Fig-4). This valve which is operated by the foot treadle 3I6 is of a four way standard reversing type, i. e., when the foot treadle 3I6 is pressed down once air flows from the valve outlet A through pipe I93 into the cylinder and moves the piston I90 (Fig. 4) to the left. When the foot is removed, the treadle automatically returns to upper position, leaving the pressure on through pipe I93. Second downward pressure on the treadle reverses flow of air, causing it to flow from the valve outlet B, through pipe I92 into the cylinder I90 on the opposite side of piston I90 and moves the latter to the right (Fig. 4) and at the same time an exhaust E opens in the valve to bleed the cylinder on the opposite side of the piston through pipe I93 and exhaust E. In this way, successive downward movements of the treadle 3I6 serve to cause air from the source or tank 3I0 to move the piston I90 in opposite directions.

' tank 3I0.

This treadle operated spindle control valve 3|! is conveniently located at the front 01' the machine as shown in Fig. 1, so that the operator can press the treadle conveniently at will. The required pipings therefrom are connected in any convenient manner. Any other suitable type of control valve may be used in place of the treadle-operated valve 3 I 5.

The rotating chuck operating pressure cylinder IN is also operated by air from the pressure To this end, a pipe or conduit 320 is connected to the distributing pipe or conduit 3I3 and to the inlet of a standard four way" reversing type air control valve 32I. The two pressure outlets A and B of this valve are connected respectively with the pipes I02 and I03 which lead to opposite sides of the piston IOI (Fig. 3). This four way" valve has a manipulating handle 322 which serves to open the pressure through A or B to conduits or pipes I02 or I03, depending upon direction of rotation of the handle and to open the other of the pipes I02 or I03 to exhaust E of the valve, so that pressure from the pipe 3I3 can be supplied to either side of the piston I0I to move it in either direction as required to open or close the chuck through corresponding movement of the draw rod I04. Bleeding of the non-pressure side of the cylinder is through the exhaust E.

Valve MI is suitably supported on the control panel 91 as shown in Fig. l and the required pipings therefrom connected to the cylinder and pressure source in any convenient manner.

In the embodiment shown, the pressure cylinders 2I0 for carriage feed and the pressure cylinders 282 for cross feed of the front and rear tools are supplied from a common pressure source. To this end, an oil or other fluid reservoir or tank 330 is provided. This tank is connected by a pump intake conduit 33I to a suitable pump 332. The pump is driven by a suitable pump motor 333 and the latter is electrically connected.

The pump outlet 0 is connected to a delivery conduit 335 which leads to the pressure inlet I of an adjustable pressure relief valve 336 of any standard type. The return outlet R of this relief valve is connected by conduit 33! to the return conduit 338 which flows back to the return side of the reservoir 330. The pressure outlet 0 of the relief valve is connected by the conduit 339 to the pressure inlet I of an adjustable pressure sequence valve 340 of a standard form. This sequence valve is of a type having a primary pressure outlet 0 and a secondary pressure outlet 0a. Operation of this valve which is automatic is such that flow at pressure inlet is directed to primary pressure outlet 0 until a pressure equa1 "to the valve setting is built up. Full pressure is then available at both outlets O and 0a and the valve acts as a T on the conduit or piping so long as pressure is maintained above the valve setting. I

The primary outlet 0 of this pressure sequence valve 340 is connected by conduits or pipes 30! and 30m to the inlet Iof a 5 way manually-operated valve 342'. The secondary outlet 0a of the pressure sequence valve 340 is connected by a conduit or pipe 343 to the inlet I of a pilot controlled and manipulated by the control handle 342'*.

This valve 342 is of a standard reversing type and has two cylinder outlets A and B, either one of which may be opened to pressure from the inlet side of the valve by operation 01! the control handle 342, when pressure from conduit34l' is open to outlet A, outlet B is open to exhaustoutlet T, and, when pressure is open to: B, outlet A is open tov exhaust outlet E.

, Pressure outlet A oi the valve is connected by pipe or conduit 345 to inlet conduits 285 'oi' the front tool cross teed cylinders 282. Pressure outslow cross feed: or the tools 289 into cutting relationship with the work blank. The A sides of let B'oi the valve is connected by pipe or conduit 345 to the inlet conduits 234' oi the front tool crossieed'cylinders my Exhaust outlet-E of the front crossieed valve 342 is connected by the conduit 341 to the inlet 1 of an adjustable flow control valve 348 of a standard type. This valve is of the type which controls therateoi fluid flow from the exhaust E. For any given setting of the metering adjustment 348* of this valve, the rate of controlled'flow is maintained independent 01 any variation 0! impressed pressure. The outlet'O oi the valve 348 is cona nested by a pipe or conduit 348 to the return flow the pressure inlet I of a second 5 way valve 352.

This valve 852 is of the same type as valve 342. Either of its .two-cylinderpressure outlets A and B may be connected,-by operation 0! the manipulating handle 352', to the pressure from conduit or pipe 351. When outlet A'is open to pressure,'

outlet B is open to exhaust T. When outlet Bis open to pressure, outlet A is open to exhaust outlet E. Exhaust outlet E is connected by the pipe or conduit 353 to the inlet I'oi a flow control valve 354 of the same kind and type as flow control valve 348. The outlet 0 of valve 354 is connected I conduit 338. Exhaust outlet T is also connected to pipe or conduit 338.

Pressure outlet A of the 5 way" rear cross feed the cylindersthrough pipes 345 are then'open to exhaust E and these cylinders bleed in controlled manner through the now control valve 348 to tank 338. Turning the valve 342 to open outlet A'to pressure closes B to pressure and opens outlet B to: outlet 'I' so that the B side of the cyllet T to tank. In this manner, slow cutting feed of the tools into the blank is effected and quic return of the tools isachieved.

Rear cross feed in likewise controlled independently by operation of the manipulating handle 352" of 5 way" rear cross ieedvalve 352 and the sameslow cutting cross feed 01 the rear tools and quick return or the said tools is achieved through the agency oi said valve352 and flow control valve 354. Thus when outlet B of valve" 352 is open-to pressure from the pipe or conduit the A sides of the rear tool slide cylinders 282 areopenthrough conduit 355 to exhaust E and these cylinders bleed through the flow con-y trol valve 354 to reservoir or tank 338. Turning outlet B to pressure and opens outlet B to outlet T so that the B side oi the cylinder bleeds directly and freely through outlet '1 of valve 352 to tank 330.

The pilot-controlled valve .344 for the carriage ieed and return is of a standard "4 way-pilotoperated type and has the two pressure outlets A and B, either of which may be opened to pressure by a pilot valve, from the conduit'or'pip'e 343 connected vto its inlet I. Whenputlet A is opened to pressure, outletfB is open to outlet-T which isconnected to return flow pipe rlcona,

duit 338 by conduit 34l and vice versa when pressure outlet B is open to pressure.

Pressure outlet A is connected by'a conduit 38!! to the inlet 1 of an adjustable flow control valve solely and inder then bleeds directly and freely through out- ,p

-the valve 352 to open outlet A to pressure, closes a i v v 36L This flow control valve is oi. the type which 1 by pipe or conduit 355 to the return flow pipe or f valve 352 is connected by pipe or conduit358' to the inlet conduits 285 oi the rear tool cross ieed cylinders 282. Pressure outlet B oi the valve 352 is connected by pipe or'conduit351 to the inlet the B- side of cylinder 218 by the pipe or conduit pipes or conduits 284 of the rear tool cross feed cylinder 282. I

Each of the two flow control valves 348, 354

has an overflow drain outlet DR connected by a irame ill at the front 01 the machine (Figs. 1, and r 5). The manipulating handles, 342* and352 thereof are conveniently locatedat the front of a the panel board. Likewise,. the flow control valves 348 and 354 are carriedon the panel board 31' and, their adjustment knobs 345' and 354' so located as to be conveniently manipulated by the.

machine operator. v a u The valve and piping arrangements just described serve to operate the toolcross teed oi both the iront and rear tools. Front cross feed is controlledIsolely and independently by. operation of sure and adjustably controlled flow in the reverse direction for bleeding the A side oi" the carriage feeding cylinder 2N. The outlet O of this'iiow control 'valve is connected to the-A side of thecarriage feeding cylinder by the conduit or pipe 2I3. Pressure outlet B is connected directly to H2. A drain outlet DR is connected by a conduit mto'the drain return conduit :01.

The pilot-controlled valve 344 is operated such that when its pressure outlet B is open; pressure is applied to the piston 2|4 onthe'B side 01 the cylinder imparting ieeding stroke to the front carriage I'I. At thesame time, the A side oi the cylinder bleeds at a controlled rate through the now control valve "I having an adjustment 381'.

When pressure outletjA-is open to pressure, outlet 4 'B is open'to outlet Tior iree return flow. Pressure from A also flows freely through the, valve 35l into the A side oi the cylinder, causingquick carriage return.

Operation oi the pilot-controlled way carriage I teed valve344 is effected by a pilot valve 385-. L Thispilot valve is a standard f4 way" reversing type having a pressure inlet I connected to the pressure conduit 335 by a pipe or conduit 353. 'It

' also has an exhaust or return outlet T connected by a pipe/or conduit 381 to the' drain return the handle 342' ct thef5 way-'iront cross teed valve 342. Turning this valve to open outlet B thereof to press'ureirom pipes 34!, 34l' causes 358. Thevalve hastwo pressure outlets A and 3, either oiwhich maybe opened to the pressure from inlet 1. When outlet A of this valve is open to pressure, outlet B is open to tank T and vice versa. Outlets A and B are connected by pipes or conduits 388 and 368 to the pilot controlled valve 3 and pressure in one pipe or the other causes required opening or closing of the pressure outlets A and B of the valve 3. The pilot valve is conveniently operated by an operatin handle 38!. This handle carries a dog or nose 385' located in the path of travel of a cam I10 suitably attached to the carriage I! (Fig. 5). This cam is of a one-way type which strike the dog or nose "5 when the carriage reaches the end of its feeding stroke and reverses the pilot valve to cause carriage return. In return stroke, the cam is inoperative to effect any tripping of the pilot valve 365. In this way, the carriage feed I return is effected automatically at the end of the feed stroke. The feed stroke is controlled by operation of the handle "5- by the operator.

The flow control valve 36!, the four-way pilot'- operated valve 3 and the pilot valve may be conveniently located on the panel 91 (Fig. l) with the various pipings or conduits conveniently led therefrom to the other parts ofthe machine.

The machine is also equipped with a suitable chip receiving tray "5 suitably supported from the frame Ill below the bed l2.

The machine, too, may be equipped with a pump system for supplying cutting fluid to the surface of the work blank. This system is illus-.-.' trated diagrammatically in Fig. 1 by the motor I pump system I". The motor of this system is controlled by a switch in located on the 'con- I trol panel 91.

The driving motor 94 of the machine is equipped" with a magnetic brake 385 or other suitable type of brake of any well-known form. This brake is or a type having its electric operating media ,3"

responsive to a start and stop handle M! of'a' switch (not shown) conveniently located ontthe The circuit connections for. the brake being conventional and well known are control panel 81.

not shown. I

Operation of the machine I I 1 Operation of the machine can best be described with reference to a hollow work blank-such as" that illustrated in Fig. 6 which is to'beshaped to conform to that shown in Fig. 6".

The two rear tool carriers 18' are positioned on the rear carriage l8 so that their cutting-tools H 299 will sever the blank W into the predeter mined length of the finished blank W of Fig. 6*.

A profile bar 254 having a profile groove 254' corresponding to the profile of the blank W of c Fig. 6 is mounted on the carriage bed in the cam grooves 253 of the profile'slide blocks 250 as previously described. Then the four front tool carriers are positioned on the front tool carriage i! in such manner that the feed stroke of the carriage i! will cause tools 289 on adjacent carriers I! to overlap slightly the start of the cut of the tool of the next succeeding carrier in the direction of feed near the end of the carriage I stroke. I

Each tool on its carrier ill or H is then adjusted for required depth of cut by the manipulating knobs 215.

A spacing mandrel 390 having a blunt forward V nose 290- (Fig. 6) is then inserted in the hollowv work blank W and the open end of the latter slid over the expansible mandrel which is in its retracted position. The treadle BIO is then pressed by the operator, causing the tall stock spindle I19 under pressure to move toward the chuck under pressure until the centering end I19 engages the centering bore 391 of the work blank and has pushed the blank onto the chuck 5 I00 to the limit permitted by the spacing mandrel 390 and maintains it in this position as long as pressure is maintained in the pressure cylinder I 90 through the pipe or conduit I93.

I The operator then operates the lever 322 of the chuck valve 32l controlling the pressure cylinder IOI which expandsthe mandrel I00 and thus couples the work blank W to the drive spindie 55 in the lathe head. I

The operator then starts the drive motor 94 by pressing switch 88 on panel 91, the oil pump motor 333 by pressing switch 334 on the same 1 levers 342', 352 and 3" to apply pressure from the oil pressur'elsystem to the cylinders 282 and 35 2! in the manner described to cause cross cutting feed pressure of the tools 299 and 299' and [feed ofthe carriage l'itoward the head. The

pressure on the tools'remains constant and they I to, their. adjusted are fed into the work blank I 30 depth by the continuous feedi Zpfassure in the respectivetool feed cylinder 2. feeding pressure in the ,eii'rriage cylinder 2lli moves the carriage along' tlie lathe bed causing the profile slide 216 of each front tool carrier is ,35 to move along the profile cam bar 254. During this movement. the .c'am followers 2" move in the profile, cam 254 and cause the 'front tools 299 to cutie-profile onv the work blank in conj'.'forii'litywlth that outlined by the profile cam ZEN-in the path of travel of the cam followers. When the carriage reaches the end of its stroke, -thecam 310, thereon trips and reverses the pilot -i,v alve dog" 385 causing quick automatic return of the carriage to its starting position. In this carriage, the operator switches oil the'drive motor- 94 and operates the magnetic braked" to stop the inc ltor-thr'ough the switch lever 381.

The toolsare then moved in quick returnstroke toretracted position by manipulation of levers rand 352 -of the 5"way." valves 342 and 352 '-;in the manner described. Then the treadle 3l6 is depressed ,to retract the tail stock spindle H8 by. reversalof direction of pressure in the air cylinder I90. I

: The finished blank is" then released from the chuck by operation of the lever 321 or the valve 320 controlling the air cylinder-i Ill. and the :Cln-

ishedblank removed, This cycle of operations'isrepeatedii'orfeach blank W treated in the machine. Y1

It isto be. understoody'o'f;

. I other types of work-blanks and that. modifications within the scope of the claims is contemqplated.

I claim: v

I 1. In a lathe having means for supporting'and rotating a work blank, a profile member, a tool 7 I axial direction of said. on said",earriage movaxial direction or said carriage movable inthe work blank; tool carriers able transversely of the work blank, each of said carriers comprising a Likewise the .single carriage feed, the tools cut the blank to I the shape shownin Fig. 6.

I llcourse,"that the mashine-is adaptable for tooling'operations onprofile slide block adjustably .positionedon said carriage. ma slide blockbeing', movable with carriage] and having a recessed portion in which said profile member is slidably received, a, tool, adjustment slide block slidably borne on .said

profile slide block, an'adjustable member, .withii;i""

saidtool adjustment slide block having a part' eextending thereirominto engagement with said prams member to efiect movement'of said tool adjustment slide block in 'coniormitywith that required by said profile member,;a pressure slide block slidably borne on said tool adjustment slide block, means m 'adjustably positioning said adjustable member relative to said tool adjustment slide blocki whereby the lattermay have its position relative-to "said profileslide block changed,

' pressure actuated means in said pressure slide 'assaias qoutline the profile oi said groove during move-.

block ior reciprocally movinl said last-named slide block relativeto said tool adjustment slide block, means for clamping a cutting tool to "said pressure slideblock, and means for supplying fiuid pressure to said pressure actuated means.

2. In a lathe having means for supporting and rotatinga work blank, a tool carriage movable in the axial direction or said work blank in its supported position, a plurality of spaced tool carriers on said carriage movable as a unit therewith and each movable transversely oi the direction of travel of said carriage, each of said car- 'riers comprising a profile slide block slidably supported on said carriage, a tool adjustment adjustment slide block. a threaded member "fixed against rotationtslidably borne in said tool ad- ,justmentslide blockfa second threaded member fixed against longitudinal displacement in said. last-named slide block and threadedly engagin I said first-named threadedmember ior adjustably positioning said tool adjustment slide block, 7 relative to said profile .slide block, a profile-bat, on which said profile slide block is movable hay-r 1 ing a' profile groove, means associated ,with said first-namedmember and engaging in said groove for guidingv said tool adjustment slide" blockto ment of said profile slide block with said carriage, means forattaching a cutting tool to-said pressure slide block, and pressure-actuated means ior'movingsaid pressure slide'block relaa ti've to' said tool adjustment slide block.

' 5. In alathe having meansfor supporting an rotatingfa'work blank, 9. tool. carriagemovable in the axial direction 01' said work blank in its a pressure slide block slidably'bome on said tool adjustment slide block, a threaded member fined against rotation slidably borne in said tool adslide block slidably borne on said profile slide block, apressure slide block slidably borne on said tool adjustment slide block, means for adjustably positioning said tool adjustment slide block relativeto said profileslide block, means for guiding said tool adjustmentslide block to outline a predetermined profile therewith during movement of said profile slide blockwith said toolcarriage, pressure actuated means for moving said pressure slide block relative to said tool adjustment slide block and 'means tor attaching a cutting tool to said pressure slide block, and

-. means for supplying fiuid pressure to said pressure actuated means.

3. In a lathe having means tor supporting. and

rotating a work blank, a tool carriage movable justment slide block, a second threaded member fixed against longitudinal displacement in said tool adjustment'slide block and threadedlyten- I adjustably positioning said tool adjustment slide in the axial direction of said work blank in its:

supported position, a tool carrier on said carriage movable therewith and movable transversely of the direction 01 travel of said carriage, said carrier comprising a'profile slide blockslidably supported on said carriage, a tool adjustment slide block slidably borne on said profile slide block,

a pressure slide block slidably borne on said tool adjustment slide block, means for adjustably' positioning said tool adjustment slide block relativeto said profile slide block, means for guiding said tool adjustment slide block to outline a pre-- determined profile during movement of said profile slide block with said tool carriage, pressureactuated means for moving said pressure slide block relative to said tool adjustment slide block, means for attaching a cutting tool to saidpressure slide block, and means for supplying fluid pressure to said pressure actuated means.

aging said first-named threaded member for blockrelative to said profileslide block, a profile bar on which said profile slide block .is movable having a profile groove, means associated with said first-named threaded member and engaging in said groove for guidingsaid tool adjustment slide block to outline the profile of said groove during movement of said profile slide block with said carriage, pressure-actuated means for movingsaid pressure slide block relative to said tool adjustment slide block, and means for supplying fiuid pressure to said pressure-actuated means.

6; In a lathe having means for supporting and rotating a work blank, a profile member having f a profile groove, a tool carriage movable in the axial direction 01' said work blank in its sup- 4; In a lathe having means for supporting and Y slide block and threadedly engaging said intermovable therewith and movable transversely of the direction of travel of said carriage, said carrier comprising a profile slide block'slidably supported position, a plurality of spaced tool cartion of travel of said carriage, each said, carrier comprising a profile slide block slidably support ed on said carriage and having a recessed portion in which said profile member is slidably received, means {or clamping said profile slide block to 7 said carriage, a tool adjustment slide block slidably borne'on said profile slide block, apressure slide block slidably borne on said tool adjustment 1 slide block, means for attaching a cutting toola to said pressure slide block, an internally thread-' ed member fixed against rotation slidably borne Within said tool adjustment slide block, a rotatl able threaded member fixed against longitudinal displacement supported in said tool adjustment nally threaded member for adjustably positioning said tool adjustment slide block-relative to said profile slide block, a follower member depending from said internally threaded member and extending into said profile groove for guid- 1118 said tool adjustment slide block to outline the o "i '9' apressureslide block slidably some on said tool.

profile 01 said groove during movement of said profile slide block with said carriage, a pressure actuating means within said pressure slide block for moving the latter relative to said tool adjustment slide block, and means for supplying fluid pressure to said pressure-actuated means.

7. In a lathe having means for supporting and rotating a work blank, aprofile member having a profile groove, a tool carriage movable in the axial direction of said work blank in its supported position, at least one tool carrier on said carrier movable therewith and movable transversely of the direction of travel of said carriage, said carrier comprising a profile slide block slidably supported on said carriage and having a recessed portion in which said profile member is slidably received, means for clamping said profile slide block to said carriage, a tool adjustment slide'block slidably borne on said profile slide block, a pressure slide block slidably borne aaaams on said tool adjustment slide block, means for attaching a cutting tool to said pressure slide block, an internally threaded member fixed against rotation slidably borne, within said tool adjustment slide block, a rotatable threaded member fixed against longitudinal displacement supported in said tool adjustment slide block and threadedly engaging said internally threaded -ember for adiustably positioning said tool adjustment slide block relative to said profile slide block, a follower member depending from said internally threaded member and extending into said profile groove for guiding said tool adjustment slide block to otuline the profile of said groove during movement of said profile slide block with said carriage, a pressure-actuating means within said pressure slide block for moving the latter relative to said tool adjustment slide block, and means for supplying fiuid pressure to said pressure-actuated means.

THOMAS LESLIE MAY. 

